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Amber

Amber is nature’s time capsule. This fossilized tree resin contains remnants of life on earth millions of years ago.

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Irradiated Topaz and Radioactivity

Spring 1992 Gem News International

A compilation of gem news from around the world, covering topics such as localities, unusual gem materials, market news, new products, discoveries, jewelry manufacturing techniques, and industry trends.

Summer 1991 G&G; Lab Notes

Reactor-Irradiated Green Topaz

Examination of samples of faceted

Summer 1994 Gem News International

Topaz, Aquamarine, and Other Beryls from Klein Spitzkoppe, Namibia

This article presents, for the first time, both gemological and geologic information on topaz, aquamarine, and other beryls from miarolitic pegmatites at Namibia’s historic Klein Spitzkoppe mineral locality.

Summer 1998 Gem News International

Summer 2007 Gem News International

Coloring of Topaz by Coating and Diffusion Processes: An X-Ray Photoemission Study of What Happens Beneath the Surface

Surface-treated topaz has become a viable alternative to topaz colored by irradiation.

Summer 2008 Gem News International

The Rutilated Topaz Misnomer

An examination of so-called

Summer 1987 G&G; Lab Notes

This section, from the Summer 1987 issue of Gems & Gemology, is a compilation of interesting finds from GIA’s laboratories.

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This Month's

Featured Gems

PERIDOT

Found in lava, meteorites, and deep in the earth’s mantle, yellow-green peridot is the extreme gem.

FANCY COLOR DIAMOND

Dazzling brilliance. Captivating color. These are the planet’s most valued gems.

DIAMOND

Diamonds are among nature’s most precious and beautiful creations.

EMERALD

Emerald is the bluish green to green variety of beryl, a mineral species that includes aquamarine.

CITRINE